
The Dryad: You’ll need to defeat one of the following bosses – Eye of Cthulhu, Skeletron, Eater of Worlds, or Brain of Cthulhu. The Zoologist: If you fill at least 10%, or 53 items, in the Bestiary, the Zoologist can spawn the following day. The Angler: A player needs to find and interact with the Angler in the ocean biome first before this NPC can spawn near appropriate housing. The Dye Trader: Spawns after a player has a dyed item or items that could craft a dye. The Demolitionist: After the Merchant spawns, the Demolitionist will appear if a player obtains any explosive item.
The Nurse: The Nurse spawns after the Merchant and if a player has more than 100 health.The Merchant: If all players combined have more than 50 silver in their inventories, the Merchant will spawn relatively soon, usually the next day.
It always spawns at the start of the game near the player to explain some basics and provide item recipes.
The Guide: This NPC doesn’t have a spawn requirement.